Biology - Mock Test 69

Question 681

In human beings duration of cardiac cycle is?

A) 0.08 sec B) 0.8 sec C) 0.5 sec D) 8.0 sec

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Question 682

In blood of Cockroach which is absent?

A) Plasma B) Blood cells C) Nutrients D) Respiratory pigment

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Question 683

Impulse originating from SA node is transmitted to?

A) Pacemaker B) AV node C) Bundle of HIS D) Purkinje system

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Question 684

Hypertension is not caused by?

A) Anaemia B) Atherosclerosis C) Obesity D) Arteriosclerosis

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Question 685

Heart wall is made of?

A) Myocardium B) Epicardium C) Endocardium D) All the above

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Question 686

Heart of cockroach is?

A) Myogenic B) Neuromyogenic C) Neurogenic D) None of the above

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Question 687

Heart of cockroach has?

A) 14 chambers B) 13 chambers C) 4 chambers D) 3 chambers

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Question 688

Heart is perfectly four-chambered in?

A) Birds B) Mammals C) Reptiles D) Both a and b

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Question 689

Heart beat originate from?

A) Left atrium B) Right ventricles C) Cardiac muscles D) Pace maker

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Question 690

Heart beat is initiated by?

A) AV node B) SA node C) Bundle of His D) Purkinje fibres

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